No it is not the servicemans number. It is the number of the badge itself. There are groups of numbers on these badges allocated to the various states and sent out after the war to mothers of the killed. Each state recorded details of to whom the badge was allocated. But number 12466 is missing from the records available. cheers.

Elizabeth, I know what the WW1 mothers and widows badge looks like ... I have it.

It is the first one shown in your link. But the point I am trying to make is, that when you open the thousands of files and search in each of the handwritten books recording individual badges at the National archives, the number on my badge (12466) is missing from the records. All the others are there in full detail. Mother, or widow, address, serviceman, unit etc. etc. I am trying to get details on one specific badge.